Propeller



B. SCHMELZER.

PROPELLER.

APPLICATION FILED IUNEZG, l l 1,331 ,586. Patented Feb. 24,1920.

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rnornnnnnl Specification of Letters Patent.

Patented Feb. 24, 1920.

Application-filed June 26, 1919; Serial No. 306,898.

To all whom it may concern e it known that L-Bruxo SCHMELZER, a citizen of the Republic of Poland, residing at Jersey City, county of Hudson, and State of New Jersey, have invented certain new and useful Improvements in Propellers, of which the following is a specification.

This invention relates to a propeller adapted for use on aeroplanes, flying machines, dirigibles, motor boats or the like, the present invention being an improvement on that disclosed in a prior patent issued to me on Sept. 12th, 1916, under No. 1,197 ,7 66.

The invention has for an object to provide a simple and cfiicient propeller construction by which a high degree both of tractive and lifting force may be exerted.

, For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the follow ing description and accompanying drawings, and t the appended claims in which the various novel features of the invent-ion are more particularly set forth.

Figure 1 of the drawings is a diagrammatic plan view showing a body or car with my improved propeller mounted thereon.

Fig. 2 is a detail plan view of the propeller and housing.

Fig. 3 is a side elevation with the housing partly broken away.

Fig. 4 is a detail cross section on the line 4:1 of Fig. 3.

My improved propeller may be mounted in any desired manner suitable to the structure to which it is applied being here shown as mounted on the upper ends of standards 1 which project inwardly from a body 2.

The propeller proper comprises a series of hollow vanes 3, of which four are here shown, which radiate from a hub 4. These vanes are approximately of rectangular shape in rear elevation with fiat rear surface 5. the rear surface of the diametrically opposed vanes being in alinement as shown. The vanes are of generally triangular shape, presenting in addition to the rear surface 5,

the concave-d side surfaces 6 and 7 which incline inwardly toward one another.

The front, or advancing, side of each vane, forming the apex of the triangular vane structure, extends radially from the hub for about half of the length of the vane and then curves backward as at 8 in a segmented curve which intersects the rear surface at right angles. A supplementary triangular head 9 extends around this curved portion of the vane structure centrally thereof, this bead decreasing in size from the extreme tip of the vane and dying away substantially at the termination of the curved part.

The propeller may be driven by a suitable motor 10, carried on the car 2, through suitable drive connections such as the bevel gear 11 on the shaft of the motor which meshes with a bevel gear 12 on the shaft 13 to which the hub 4 is fixed.

31 semi-circular housing 15 cooperates with the propeller, this housing being of a size and shape to closely inclose the propeller and being mounted concentrically thereto on the standards 1, the housing having hubs 16 which support the shaft 13 and which are in turn supported in suitable bearings in the standards 1.

Fixed on one of the hubs 16 of the housing is a bevel gear 17 which meshes with a second gear 18 on the end of an oscillatory rod 19 carried in suitable bearings 20 in the body 2 and having its opposite end located near the drivers seat 21 of the car and provided with a handle 22. By rotating the rod 19 the housing may be shifted around the propeller as desired. The rod 19 may be releasably locked by means of a detent 23 pivoted as at 2 1 to a fixed part and adapted to engage a toothed wheel 25 fixed to the rod.

As will be apparent the housing may be shifted around the propeller to occupy any position desired so as to cause. the beat of the vanes on the air to drive the vehicle either in a horizontal direction or to cause it to ascend or descend.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is

1.. In combination, a rotary propeller made upof a series of vanes presenting fiat radially extending rear surfaces, a semi-circular housing of a width and shape to closely inclose said vanes. and means for angularly adjusting said housing.

2. A propeller having a vane consisting of a hollow structure of substantially triangulair shape in cross section, with a flat rear surface extending transversely to the plane of rotation of the propeller and radially to the axis thereof.

3. A propeller having a vane consisting of a hollow structure of substantially triangular shape in cross section, with a fiat rear surface extending transversely to the plane of rotation'of the propeller, and having concaved forwardly extending sidesurfaces. I

4. A propeller having a vane consisting of a hollow structure of substantially triangular shape with the apex of the triangle 011 the advancing side of the vane, the rear side of said vane being fiat and extending radi ally for a distance from the base and then curving outwardly and rearwardly to meet the said rear side.

5. A propeller having a vane consisting of a hollow structure of substantially triangular shape with the apex of the triangle on the advancing side of the vane, the rear side of said vane being fiat and extending radially for a distance from the base and then curving outwardly and rearwardly to ,meet the said rear side, the sides of the said triangle being concaved.

In testimony whereof he has slgned his name to'this specification, this 3rd day of June, 1919. a

, BRUNO SCHMELZER. 

